ooli@lemmy.world to Space@lemmy.world · 5 months agoWhy Is the Night Sky Black? #shortspiped.privacydev.netexternal-linkmessage-square2fedilinkarrow-up14arrow-down112
arrow-up1-8arrow-down1external-linkWhy Is the Night Sky Black? #shortspiped.privacydev.netooli@lemmy.world to Space@lemmy.world · 5 months agomessage-square2fedilink
minus-squareEl Barto@lemmy.worldlinkfedilinkarrow-up3·edit-24 months agoFuck shorts. Tl;dw: because the universe has a beginning (not infinitely old) so the light of some stars hasn’t reached us yet; also, because some stars have already died; and finally, because of the expansion of the universe (light gets red-shifted.)
Fuck shorts.
Tl;dw: because the universe has a beginning (not infinitely old) so the light of some stars hasn’t reached us yet; also, because some stars have already died; and finally, because of the expansion of the universe (light gets red-shifted.)